Which LW installer did you use? The online (recommended) one has been known to cause trouble for some people!

Try this, it's probably easier than messing around with other pgms to delete your files. At least for starters:

Download the latest Java JRE, using the offline installer here
http://java.sun.com/javase/downloads/index.jsp

Go to add/remove programs & remove your old version of Java. Now reinstall the new Java. Reboot.

Download the offline installer for LW
http://www.limewire.com/english/content/download.shtml

Now see if LW will install properly.